Current feedback based harmonic compensation
AssigneeAtieva, Inc.
InventorBharadwaj Acharya
Life of this patent
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Abstract
An electric vehicle (EV) comprising a three-phase motor comprising a rotor and a stator, wherein the stator comprises N number of slots, and an inverter, configured to receive a sensed a three-phase current of the three-phase motor, and generate, based on the three-phase current, a three-phase alternating current (AC) voltage. The three-phase AC voltage comprises a harmonic that is associated with a fundamental frequency associated with a speed of a rotation of the three-phase motor. The three-phase AC voltage is fed as input to windings of the three-phase motor and causes the rotation of the rotor.
Claims20
A system comprising
- a three-phase motor comprising a rotor and a stator, wherein the stator comprises N number of slots;
- and
- an inverter, configured to:
- receive a sensed a three-phase current of the three-phase motor, and
- generate, based on the three-phase current, a three-phase alternating current (AC) voltage that is coupled to windings of the three-phase motor and cause a rotation of the rotor, wherein the three-phase AC voltage comprises a harmonic that is associated with a fundamental frequency associated with a speed of the rotation of the three-phase motor.
An electric vehicle comprising:
- a battery pack;
- a three-phase motor comprising a rotor and a stator, wherein the stator comprises N number of slots;
- and
- an inverter, to receive energy from the battery pack, configured to:
- receive a sensed a three-phase current of the three-phase motor, and
- generate, based on the three-phase current, a three-phase alternating current (AC) voltage that is coupled to windings of the three-phase motor and cause a rotation of the rotor, wherein the three-phase AC voltage comprises a harmonic that is associated with a fundamental frequency associated with a speed of the rotation of the three-phase motor.
A method, performed by a processing device of an inverter, comprising:
- receiving a sensed a three-phase current of a three-phase motor, wherein the three-phase motor comprises a rotor and a stator, and wherein the stator comprises N number of slots;
- and
- generating control signals, based on the three-phase current;
- and
- driving a power circuit of the inverter to generate a three-phase alternating current (AC) voltage that is applied to windings of the three-phase motor, wherein the three-phase AC voltage comprises a harmonic that is associated with a fundamental frequency associated with a speed of a rotation of the three-phase motor.
Dependencies are inferred from the claim text.